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Renesas ISL99227HRZ-TR5784
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- ISL99227HRZ-TR5784
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ISL99227HRZ-TR5784.pdf
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Product details
Overview
ISL99227HRZ-TR5784 from Renesas Electronics is a Smart Power Stage (SPS) module integrating high-side and low-side MOSFETs, gate drivers, current monitor (IMON), temperature monitor (TMON), and comprehensive fault protection. It delivers 60A DC output with ±3% current sensing accuracy, 8mV/°C thermal sensing, and supports up to 2MHz switching in VRM/VRD applications for microprocessor core voltage regulation.
For engineers reviewing the ISL99227HRZ-TR5784 datasheet, ISL99227HRZ-TR5784 pinout, ISL99227HRZ-TR5784 application, or ISL99227HRZ-TR5784 equivalent, this device serves as a drop-in 3.3V PWM-compatible SPS for Renesas ISL68xxx/69xxx digital multiphase controllers - eliminating DCR sensing networks while enabling precise per-phase current and thermal telemetry in high-density server and networking POL converters.
Technical Context
The ISL99227HRZ-TR5784 implements a synchronous buck power stage with integrated 3.84mΩ high-side and 0.76mΩ low-side MOSFETs, tri-state 3.3V PWM input logic, and dedicated LGCTRL pin for forced low-side FET disable. Its downslope current sensing architecture samples LFET current post-PWM fall, with 160ns blanking time and IMON output referenced to external REFIN (0.8–1.6V).
Thermal monitoring uses an on-die sensor with 8mV/K coefficient (0.6V + 8mV·TJ), feeding TMON for multiphase bus sharing; overtemperature protection triggers at +140°C (±5°C hysteresis). Fault reporting combines open-drain FAULT# (active-low) with IMON pull-up (REFIN + 1.2V) and TMON pull-high (2.5V) for independent current, thermal, and HFET short detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Continuous Current Rating | 60A DC - supports high-current CPU/GPU core rails without external current sense resistors. |
| Input Voltage Range | +4.5V to +18V - compatible with 5V, 12V, and 15V intermediate bus architectures. |
| Current Monitor Accuracy | ±3% at ≥10A, TJ = +40°C to +125°C - enables precise closed-loop current balancing across multiphase systems. |
| Temperature Sensing | 8mV/°C linear output (0.6V + 8mV·TJ) - allows direct analog readback of junction temperature with ±15°C hysteresis for OT recovery. |
| Switching Frequency | Up to 2MHz - enables compact magnetics and fast transient response in high-frequency VRMs. |
| MOSFET rDS(on) | HS: 3.84mΩ / LS: 0.76mΩ - minimizes conduction loss and improves light-load efficiency via dedicated LGCTRL control. |
| Operating Temperature | -10°C to +100°C (HRZ grade) - validated for industrial and extended-temperature server motherboard environments. |
| Package | 32-lead 5×5 mm PQFN Double Cooling - thermally enhanced for ≤4°C/W junction-to-case resistance and minimal PCB footprint. |
Pinout & Package
ISL99227HRZ-TR5784 is housed in a 32-lead, 5mm × 5mm, 0.5mm pitch PQFN package with double-sided thermal cooling (exposed paddle on top and bottom). The package features multiple GND and VIN pads for low-inductance power delivery and optimized thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (LGCTRL) | Lower gate control input | Logic signal forcing GL low (LFET off); must not float - used for safe startup, phase shedding, or fault recovery. |
| 2 (VCC) | +5V logic bias supply | Powers internal logic and PWM interface; requires local 1µF X7R ceramic decoupling to GND. |
| 3 (PVCC) | +5V gate drive bias supply | Supplies high-current gate drivers; requires local 1µF X7R ceramic decoupling to GND. |
| 9–16, 21–23, 27 (VIN) | Main power input | Connects to drain of HFET; multiple pins reduce parasitic inductance - requires ≥2×10µF X5R/X7R ceramics near package. |
| 9–16 (SW) | Switch node | HFET source/LFET drain junction; connects directly to output inductor - critical high-di/dt path requiring tight layout. |
| 25 (BOOT) | Floating bootstrap supply | Charges upper gate driver via internal NFET "bootstrap diode"; requires 0.1–0.22µF ceramic between BOOT and PHASE. |
| 26 (FAULT#) | Open-drain fault reporting | Pulled low on UVLO, overtemperature, overcurrent, or HFET short - used to disable controller EN or trigger system alert. |
| 28 (PWM) | 3.3V tri-state PWM input | Accepts 3.3V logic with defined shutdown window (1.3–1.8V); forces both FETs off when held in tri-state. |
| 30 (REFIN) | Current monitor reference input | 0.8–1.6V external reference sets IMON offset; connects to controller's current-sense input with 100Ω series + 470pF filter. |
| 31 (IMON) | Current monitor output | Output = REFIN + (IL × gain); pulled to REFIN + 1.2V during HFET overcurrent - provides real-time per-phase current telemetry. |
| 32 (TMON) | Temperature monitor output | Analog voltage = 0.6V + 8mV/°C × TJ; multiphase buses share TMON pins - highest voltage dominates for system-level thermal management. |
Key Features
| Feature | Design Value |
|---|---|
| Dedicated LGCTRL pin | Enables hardware-controlled low-side FET disable for safe startup, phase shedding, or fault containment without PWM interruption. |
| Integrated downslope current sensing | Eliminates need for external DCR network or sense resistors - reduces BOM count, board area, and thermal compensation complexity. |
| Tri-state PWM input with shutdown window | 3.3V-compatible logic with 1.3–1.8V tri-state range - allows controller-initiated safe shutdown of both FETs within <50ns propagation delay. |
| Internal bootstrap NFET | Replaces discrete bootstrap diode - reduces component count and improves reliability while supporting 2MHz operation with 0.1–0.22µF capacitor. |
| Comprehensive fault protection | Includes HFET overcurrent (90A trip), HFET short detection (SW >100mV during GL high), VCC/VIN UVLO, and overtemperature (+140°C). |
| Double-cooling PQFN package | 32-lead 5×5 mm package with top and bottom thermal pads achieves θJC = 4°C/W - enables high-power density without heatsinks in server VRMs. |
Applications
| Server Core Voltage Regulation | AI Accelerator GPU Power Delivery |
|---|---|
|
Use Scenario: High-current, multi-phase VRM supplying 1.0–1.8V core voltage to dual-socket Xeon or EPYC processors in rack-scale servers. IC Role / Device Role / Timing Role: Smart Power Stage providing per-phase current/temperature telemetry, fault reporting, and synchronized gate drive to ISL69xxx controllers. Use Value: Enables dynamic phase shedding, real-time thermal derating, and predictive maintenance via accurate IMON/TMON data - improving system uptime and energy efficiency. |
Use Scenario: Compact, high-efficiency POL converter delivering up to 60A per phase to NVIDIA A100/H100 GPU memory and compute rails. IC Role / Device Role / Timing Role: Integrated SPS handling 2MHz switching, downslope current sensing, and coordinated fault signaling to digital multiphase controllers. Use Value: Reduces PCB area by 35% vs discrete solutions while maintaining ±3% current accuracy - critical for dense AI accelerator modules with strict thermal budgets. |
| Cloud Networking ASIC Power | Gaming Console SoC Regulation |
|
Use Scenario: High-density 48V-to-1V VRM powering 128-core networking ASICs in 1RU switches with strict EMI and thermal constraints. IC Role / Device Role / Timing Role: 3.3V PWM-compatible SPS interfacing with ISL68201 hybrid controllers, delivering precise current balance and thermal telemetry across 12+ phases. Use Value: Eliminates DCR sensing networks and associated thermal drift errors - ensuring stable current sharing and preventing hot-spot formation under burst traffic loads. |
Use Scenario: Low-noise, high-transient-response VRM for AMD/Intel SoCs in next-gen gaming consoles requiring rapid load steps from idle to full GPU utilization. IC Role / Device Role / Timing Role: Smart Power Stage with LGCTRL-driven phase shedding and 2MHz capability to meet sub-100ns transient response requirements. Use Value: Achieves >95% peak efficiency at 1.2V/40A while maintaining <5mV output deviation - preserving battery life and thermal headroom in portable gaming devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Smart Power Stage applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL99227FRZ-T | Same 60A rating and 3.3V PWM, but rated for -40°C to +125°C junction temperature. | Suitable for harsh-environment industrial or automotive under-hood applications where HRZ's -10°C lower limit is insufficient. | Select ISL99227FRZ-T only if extended temperature qualification is required; HRZ offers cost and supply-chain advantage for commercial server use. |
| ISL99227BFRZ-T | 5.0V PWM input (vs HRZ's 3.3V), identical 60A rating, same package and monitoring features. | Designed for compatibility with ISL6617A phase doublers and legacy 5V PWM controllers - not interoperable with ISL68xxx/69xxx 3.3V systems. | Choose ISL99227BFRZ-T only when paired with 5V PWM controllers; HRZ is mandatory for Renesas digital multiphase ecosystems. |
Compared with ISL99227FRZ-T and ISL99227BFRZ-T, the ISL99227HRZ-TR5784 provides optimal thermal performance for high-volume server applications operating between -10°C and +100°C, with guaranteed 3.3V PWM compatibility and seamless integration into ISL68xxx/69xxx-based VRM designs - avoiding requalification effort or layout changes.
Availability
ISL99227HRZ-TR5784 is available at Aetrix Electronics and suitable for server motherboard design, AI accelerator power delivery, and cloud networking ASIC regulation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ISL99227HRZ-TR5784 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog, power management, and timing solutions for automotive, industrial, and datacenter applications.
The ISL99227HRZ-TR5784 belongs to Renesas' Smart Power Stage family, engineered specifically for high-efficiency, high-density multiphase VRMs in servers, AI accelerators, and networking equipment - emphasizing integrated telemetry, robust fault protection, and thermal-aware power delivery.
FAQ
What is the maximum continuous current rating of the ISL99227HRZ-TR5784?
The ISL99227HRZ-TR5784 is rated for 60A DC continuous output current under recommended operating conditions (VIN = 4.5–18V, TJ ≤ +100°C). This rating assumes proper PCB layout with adequate copper area, thermal vias, and decoupling - as specified in the FN8684 datasheet Section "PCB Layout Considerations". Peak current capability exceeds 150A for short durations.
Does the ISL99227HRZ-TR5784 support 2MHz switching frequency?
Yes, the ISL99227HRZ-TR5784 supports up to 2MHz switching frequency, as confirmed in the "Features" section of the FN8684 datasheet. Its gate drivers, MOSFETs, and bootstrap circuitry are characterized for stable operation at this frequency - enabling compact magnetics and fast transient response in high-performance VRMs.
How does the ISL99227HRZ-TR5784 implement current monitoring without a sense resistor?
The ISL99227HRZ-TR5784 uses integrated downslope current sensing on the low-side FET, generating an IMON output proportional to IL (with ±3% accuracy). It references an external REFIN voltage (0.8–1.6V) and requires no DCR network or shunt resistor - reducing component count, board space, and thermal drift errors in multiphase systems.
What is the purpose of the LGCTRL pin on the ISL99227HRZ-TR5784?
The LGCTRL pin on the ISL99227HRZ-TR5784 provides hardware-level control of the low-side FET: driving it low forces GL low (LFET off), regardless of PWM state. This enables safe startup sequencing, phase shedding, and fault containment - critical for system-level reliability in server and AI power applications.
Is the ISL99227HRZ-TR5784 pin-compatible with other ISL99227 variants like ISL99227FRZ-T?
Yes, the ISL99227HRZ-TR5784 is pin-compatible with all ISL99227 variants (IRZ, HRZ, FRZ) and shares identical 32-lead 5×5 mm PQFN packaging, pinout, and electrical interface. Differences are limited to temperature grade (-10°C to +100°C for HRZ vs -40°C to +125°C for FRZ) and tape-and-reel packaging - no PCB redesign is needed when upgrading within the ISL99227 family.
ISL99227HRZ-TR5784 Specifications
- Product attributes
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- Manufacturer:
- Renesas
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- Bulk
- Product Status:
- Obsolete
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ISL99227HRZ-TR5784 FAQ
1.How can I place an order for ISL99227HRZ-TR5784 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL99227HRZ-TR5784 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ISL99227HRZ-TR5784 reliable?
The price and inventory of ISL99227HRZ-TR5784 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL99227HRZ-TR5784 is usually 5 days.
3.What payment methods are accepted for ISL99227HRZ-TR5784?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL99227HRZ-TR5784 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL99227HRZ-TR5784?
ISL99227HRZ-TR5784 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL99227HRZ-TR5784 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ISL99227HRZ-TR5784?
For technical support, including ISL99227HRZ-TR5784 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL99227HRZ-TR5784 requirements.
6.How does Aetrix verify that ISL99227HRZ-TR5784 is sourced from the original manufacturer or authorized distributors?
All ISL99227HRZ-TR5784 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ISL99227HRZ-TR5784 meets industry standards.
7.What is the process for return or replacement of ISL99227HRZ-TR5784?
All ISL99227HRZ-TR5784 units undergo pre-shipment inspection (PSI). If there is an issue with ISL99227HRZ-TR5784, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ISL99227HRZ-TR5784 part is unused and in its original packaging.
Return procedure for ISL99227HRZ-TR5784:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL99227HRZ-TR5784 Tags
-
UMFT234XF
FTDI, Future Technology Devices International Ltd
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ISL99227HRZ-T7A
Renesas
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284
Adafruit Industries LLC
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DEV-09716
SparkFun Electronics
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DEV-09873
SparkFun Electronics
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WIZnet
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WIZ850IO
WIZnet
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WIZ750SR-TTL
WIZnet
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WIZ750SR-110
WIZnet
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WIZ812MJ
WIZnet
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WIZ810MJ
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